1. Preheat the oven to 350°F and line two baking sheets with parchment paper.

2. In a large bowl, beat the peanut butter, softened butter, brown sugar, and granulated sugar until smooth and fluffy.

3. Add the eggs one at a time, then mix in the vanilla extract until fully combined.

4. In a separate bowl, whisk together the flour, baking soda, and salt.

5. Gradually add the dry ingredients to the wet ingredients and mix just until a soft dough forms.

6. Fold in the chocolate chips and M&M’s, reserving the extra M&M’s for the tops.

7. Scoop the dough into large balls and place them on the prepared baking sheets, leaving space between each one.

8. Press a few extra M&M’s onto the tops of the dough balls.

9. Bake for 10 to 12 minutes, until the edges are lightly golden and the centers are still slightly soft.

10. Let the cookies cool on the baking sheet for 5 minutes, then transfer them to a wire rack to cool completely.